Asahi Kasei has the right chemistry for Japanese markets, so right in fact that it is among Japan's Top 3 chemical companies (with Sumitomo and Mitsubishi). The diversified company operates in six segments. Its chemicals (basic chemicals, plastics, fertilizers) and homes (prefabricated homes) units together account for about three-quarters of Asahi Kasei's sales. The company's fibers unit makes nylon, and its construction materials division makes concrete panels and artificial fish reefs. Asahi Kasei also makes electronic materials and medical products. Roughly two-thirds of its sales are in Japan, though the country hosts substantially all -- more than 90% -- of its assets.